Underdrain pipe

Details Underdrain pipe Underdrain pipe

1997-04-09

2000-06-20

Lillis, Eileen Dunn

Hydraulic and earth engineering

Drainage or irrigation

Porous or apertured pipe, flume, or tileway

405 36, 405 44, 405 45, 405 49, 138106, 138121, 138177, E02B 1100, E02B 1300, F16L 1100

Patent

active

060769920

ABSTRACT:
An underdrain pipe has a pipe wall in which wall portions rectangular in section and wall portions circular in section are disposed alternately in a longitudinal direction of the pipe, in which a number of water collecting small holes are formed in portions of the pipe wall, and in which the whole of the pipe wall is formed of material of synthetic resin or rubber.

REFERENCES:
patent: 970383 (1910-09-01), McCulloch
patent: 2230306 (1941-02-01), McDonald
patent: 3693664 (1972-09-01), Schmunk
patent: 4624603 (1986-11-01), Kanao
patent: 4650367 (1987-03-01), Dietzler
patent: 4930936 (1990-06-01), Hegler et al.
patent: 4950103 (1990-08-01), Justice
patent: 5120038 (1992-06-01), Stine
patent: 5799703 (1998-09-01), Kanao et al.
patent: 5832960 (1998-11-01), Amatsutsu et al.
patent: 5839477 (1998-11-01), Murayama

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